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Titel |
Monitoring environmental effects of shale gas exploitation at Wysin in Poland. |
VerfasserIn |
Stanislaw Lasocki, Janusz Mirek, Wojciech Bialon, Szymon Cielesta, Mateusz Lasak, Simone Cesca, Jose Angel Lopez Comino, Torsten Dahm, Roberto Scarpa, Andrew Gunning, Nelly Montcoudiol, Catherine Isherwood, Janusz Jarosławski, Jakub Guzikowski |
Konferenz |
EGU General Assembly 2017
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Medientyp |
Artikel
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Sprache |
en
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 19 (2017) |
Datensatznummer |
250144550
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Publikation (Nr.) |
EGU/EGU2017-8388.pdf |
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Zusammenfassung |
Environmental effects of shale gas exploration and exploitation are extensively studied in the
framework of “Shale Gas Exploration and Exploitation Induced Risks” project (SHEER,
H2020-LCE 16-2014-1). One of the main component of this study is on-site monitoring of
the effects at Wysin shale-gas play of Polish Oil and Gas Company in Poland. This includes
monitoring of seismicity and water and air quality.
Surface seismic monitoring network consists of 6 surface broadband (BB) seismometers
and 25 surface short-period (SP) seismometers The SPs are assembled into three small
aperture arrays with 9, 8 and 8 stations, respectively, distributed in a triangle geometry at a
distance of about 2-4 km from the hydrofracturing rig. Each array is complemented with
one BB station. The three remaining BBs are located up to about 5 km from the
rig. In addition 3 borehole broadband seismometers are located in three shallow
boreholes.
The groundwater monitoring makes use of four wells, which reach a main underground
water reservoir. Three complementary datasets are collected: continuous monitoring of
borehole data, laboratory analyses of water samples and field monitoring of water quality
parameters. The continuous monitoring makes use of down-hole probes, which have been
installed in each borehole. The probes record absolute pressure, temperature and electrical
conductivity. In addition, a barometric probe has been installed above ground to record
atmospheric pressure in order to allow conversion of absolute pressure to a water level. After
collection, water samples are sent to an accredited laboratory for analysis. The
field monitoring is undertaken during the sampling visits. Whilst the borehole is
being purged, physico-chemical parameters are monitored using a multi-parameter
probe. This measures and records temperature, specific conductivity, pH, dissolved
oxygen and oxidation-reduction potential within the water. Hydrocarbon gas content
within the water is below detection limits for methane, ethane, ethene and propane
gases.
Air pollution monitoring is performed by means of an automatic station. The station is
situated east from the Wysin rig at the distance of some 1200 m. This distance is
appropriate in order not to measure a direct emission of pollutants. The station
monitors the content of NO, NO2, NOx, CO, PM10, O3, CO2, CH4, NMHC and
Radon.
At the beginning of SHEER project in May 2015, there was one vertical well at the site,
reaching gas-bearing shale formations at the nearly 4km depth. Further on two
horizontal wells, each of about 1.7km length, were drilled (late Autumn 2015) and
fracked (June – August, 2016). This time table has provided the opportunity to
record background seismicity and baseline levels of water and air quality, and then
to record the immediate and delayed effects of hydrofracturing operations. The
monitoring will continue at least 1.5 year after completion of technological activity at the
site.
This work was supported within SHEER: "Shale Gas Exploration and Exploitation
Induced Risks" project funded from Horizon 2020 – R&I Framework Programme, call
H2020-LCE-2014-1 and within statutory activities No3841/E-41/S/2016 of Ministry of
Science and Higher Education of Poland. |
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